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Search Results for: navier stokes
“Colorful fluid dynamics” and overconfidence in global climate models
by David Young This post lays out in fairly complete detail some basic facts about Computational Fluid Dynamics (CFD) modeling. This technology is the core of all general circulation models of the atmosphere and oceans, and hence global climate models … Continue reading
Posted in Uncategorized
How the Disinformation Industrial Complex is destroying trust in science
by David Young Much has changed in science since the pandemic and much of it is change for the worse. The pandemic has highlighted the loss of credibility of the public health establishment and the often toxic nature of current … Continue reading
Posted in Uncategorized
Of boundary and initial conditions
by Dan Hughes and Tomas Milanovic Further reflections on the application of the divergence theorem to the Earth’s climate system.
Posted in climate models
Determinism and predictability
by Tomas Milanovic There are few scientific concepts that are more often misunderstood in blog debates than Determinism and Predictability. For many commenters, these two concepts are considered to be in fact equivalent, which leads to faulty or irrelevant arguments.
Posted in climate models
Global climate models and the laws of physics
by Dan Hughes We frequently see the simple statement, “The Laws of Physics”, invoked as the canonical summary of the status of the theoretical basis of GCMs.
Posted in climate models
Climate models for lawyers
by Judith Curry I have been asked to write an Expert Report on climate models. ***SEE UPDATE
Posted in climate models
How simple is simple?
by Tomas Milanovic This essay has been motivated by Isaac Held’s paper [link] arguing for possible emerging simplicity or even linearity in climate dynamics.
Posted in climate models
The Astonishing Math of Michael Ghil’s Climate Sensitivity
by Robert Ellison Climate sensitivity is large in the vicinity of tipping points but moderate otherwise.
Posted in Sensitivity & feedbacks
Ergodicity
by Tomas Milanovic On the thread Trends, Change Points and Hypotheses, the issue of ergodicity was mentioned numerous times, and some clarification of this concept is needed. So what is and what is not ergodicity and why does it matter … Continue reading
Posted in Uncategorized
UQ
by Judith Curry The new International Journal of Uncertainty Quantification has some very interesting papers. Lets take a look at a paper entitled ‘Error and Uncertainty Quantification and Sensitivity Analysis in Mechanics Computational Models.’
Posted in climate models, Uncertainty
Proc. Roy. Soc. Special Issue on ‘Handling Uncertainty in Science’
by Judith Curry The Royal Society Discussion Meeting on Handling Uncertainty in Science, held 22/23 March 2010, played a seminal role in motivating me to investigate uncertainty in the climate debate.
Posted in Uncertainty
Chaos, ergodicity, and attractors
by Tomas Milanovic This post has been triggered by the following comment from Eli Rabbett in the spatio-temporal chaos thread :
Posted in Prediction
Spatio-temporal chaos
by Tomas Milanovic There are scientists who equate chaos to randomness. I’d put that category at 90%. There are scientists who equate chaos with Lorenz. They have seen the butterfly attractor picture one day or the other. They know that … Continue reading
Posted in Uncategorized
CO2 no-feedback sensitivity: Part II
by Judith Curry So how to define this problem to make sense? Or can we? To focus the discussion started on the previous thread, I am highlighting some of the defining or thought provoking statement from the the previous thread:
Posted in Greenhouse effect
What can we learn from climate models?
by Judith Curry Short answer: I’m not sure.
Posted in climate models, Uncertainty
Water vapor mischief
There is a provocative new paper available at an online discussion journal: Makarieva, Gorshkov, Sheil, Nobre, Li: Where do winds come from? A new theory on how water vapor condensation influences atmospheric pressure and dynamics. link
Posted in climate models
